Sponge holder



FIG. 1 is a left side elevation of a sponge holder showing our new design, which is a mirror image of a right side elevation.

FIG. 2 front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a top view thereof.

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a perspective view thereof. 

We claim the ornamental design for a sponge holder, as shown and described. 